The cards Question In probability, what is a trial? Tap to flip Answer A single predefined test. Question In probability, what is an outcome? Tap to flip Answer A result of a trial. Question What is a theoretical probability based on? Tap to flip Answer Counting the desired outcomes in a sample space where every individual outcome is equally likely. Question What does a probability of 0 mean? Tap to flip Answer The outcome is impossible. Question What does a probability of 1 mean? Tap to flip Answer The outcome is certain. Question When are two or more events mutually exclusive? Tap to flip Answer When they share no common outcome. Question When is a set of events exhaustive? Tap to flip Answer When at least one of them has to occur whenever the experiment is carried out. Question Give one form in which a probability can be written. Tap to flip Answer e.g. a fraction, a decimal or a percentage. Question When do the probabilities of a set of events sum to 1? Tap to flip Answer When the events are both exhaustive and mutually exclusive. Question How is the probability of an event defined in terms of an experiment? Tap to flip Answer The proportion of times the event is expected to happen in a suitably large experiment. Question In a probability problem, give one thing a variable can stand for. Tap to flip Answer e.g. a probability, a frequency or a particular outcome. Question In statistics, what is a frequency? Tap to flip Answer The number of times an event occurs, or the number of individuals with some specific property. Question On a tree diagram, what do the branches represent? Tap to flip Answer Different possible events or outcomes. Question What does a frequency tree show? Tap to flip Answer How often an outcome happened within a set number of trials. Question When finding a probability from a frequency tree, what should the denominator be? Tap to flip Answer The total frequency of the group being selected from, which may be the whole population or a subgroup. Question What two kinds of information can a two-way table display? Tap to flip Answer Either the sample space of individual outcomes or the frequencies of outcomes. Question To find a probability along consecutive branches of a probability tree, do you add or multiply the branch probabilities? Tap to flip Answer Multiply them. Question Why can adding the probabilities along the branches of a tree give a result that must be wrong? Tap to flip Answer It can give a value greater than 1, and a probability cannot be greater than 1. Question What is another name for experimental probability? Tap to flip Answer Relative frequency. Question When is a trial or experiment fair? Tap to flip Answer When each outcome has an equal chance of happening. Question What does it mean if a trial or experiment shows bias? Tap to flip Answer Its outcomes are not equally likely. Question If outcome A happens more often than outcome B in an experiment, does that prove A is more likely? Tap to flip Answer No. Even equally likely outcomes can occur different numbers of times by chance. Question In probability, what is an experiment? Tap to flip Answer A trial repeated many times to observe how often each outcome occurs. Question As the sample size increases, what happens to experimental probabilities? Tap to flip Answer They approach the theoretical probabilities. Question What is set notation in probability? Tap to flip Answer A shorter way of writing probability statements. Question What does A ∪ B represent? Tap to flip Answer All members that satisfy at least one of A or B: from A, from B or from both. Question In a Venn diagram, what is commonly used to represent events? Tap to flip Answer Circles. Question What is conditional probability? Tap to flip Answer The probability of an outcome occurring given that another event has occurred. Question When is event A independent of event B? Tap to flip Answer When the probability of A occurring is not affected by whether or not B occurs. Question What is the opposite of independent events? Tap to flip Answer Dependent events. Question What does P(A|B) mean? Tap to flip Answer The probability of event A given B. Question What does each branch of a probability tree show? Tap to flip Answer A possible outcome of an event or stage of a trial, with the probability of that outcome happening. Question Two marbles are taken from a bag at once. On a probability tree, by how much does the denominator fall for the second marble: 1 or 2? Tap to flip Answer By 1. Think of it as choosing one marble and then immediately choosing a second. Question What mistake leads to placing a probability in the wrong position on a probability scale? Tap to flip Answer Miscounting the number of intervals on the scale. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Maths Unit Conditional probability Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
Sources Total: 13 · primary: 13 · second publisher: 0
Show the other sources (11) Primary source Conditional probability in a Venn diagram (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Conditional probability in a tree diagram (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Problem solving with conditional probability (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking and securing exhaustive events (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Probabilities involving algebra (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Frequency trees (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking and securing calculating probabilities from tables (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Checking and securing calculating probabilities from diagrams (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Experimental probability (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Experimental vs theoretical probability (opens in a new tab) (Oak National Academy, thenational.academy) Primary source Set notation (opens in a new tab) (Oak National Academy, thenational.academy) Found a mistake? Write to support@flashfeed.app .
A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)
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